Other Intangible Assets - Other Intangible Assets (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Finite Lived Intangible Assets [Line Items]
Cost	$ 8,901,000	$ 8,901,000
Amortization Expense	423,000	425,000
Accumulated Amortization	8,080,000	7,657,000
Cost, Net of Accumulated Amortization	$ 821,000	$ 1,244,000
Covenant Not to Compete [Member]
Finite Lived Intangible Assets [Line Items]
Life	5 years	5 years
Cost	$ 775,000	$ 775,000
Amortization Expense	0	0
Accumulated Amortization	775,000	775,000
Cost, Net of Accumulated Amortization	0	0
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Cost	7,922,000	7,922,000
Amortization Expense	421,000	421,000
Accumulated Amortization	7,101,000	6,678,000
Cost, Net of Accumulated Amortization	$ 821,000	$ 1,244,000
Customer Relationships [Member] | Maximum [Member]
Finite Lived Intangible Assets [Line Items]
Life	20 years	20 years
Customer Relationships [Member] | Minimum [Member]
Finite Lived Intangible Assets [Line Items]
Life	18 years	18 years
Third Party Administrator Licenses [Member]
Finite Lived Intangible Assets [Line Items]
Life	15 years	15 years
Cost	$ 204,000	$ 204,000
Amortization Expense	2,000	4,000
Accumulated Amortization	204,000	204,000
Cost, Net of Accumulated Amortization	$ 0	$ 0